Presentation and outcome of gastrointestinal involvement in hepatitis C virus-related systemic vasculitis: a...

Area of Science:

• Hepatology
• Rheumatology
• Gastroenterology

Background:

• Gastrointestinal (GI) involvement in systemic vasculitis often indicates a poor prognosis, necessitating immunosuppressive therapy.
• The clinical significance of GI involvement in hepatitis C virus (HCV)-related vasculitis remains unevaluated, particularly in the context of modern antiviral treatments.

Purpose of the Study:

• To assess the impact of GI involvement on the presentation and outcomes of patients with HCV-related systemic vasculitis.
• To compare the clinical characteristics and survival rates of patients with and without GI involvement.

Main Methods:

• Retrospective review of data from 163 patients diagnosed with HCV-related systemic vasculitis.
• Comparison of patients with GI involvement (GI+) against those without (GI-) regarding clinical presentation, organ involvement, and treatment response.

Main Results:

• GI manifestations occurred in 7.4% of patients, frequently presenting as abdominal pain, surgical abdomen, or intestinal bleeding.
• GI+ patients exhibited higher rates of renal and cardiac involvement, medium-vessel vasculitis, and elevated mixed cryoglobulinemia levels compared to GI- patients.
• Despite more severe initial manifestations, GI+ and GI- patients demonstrated comparable clinical, immunological, and virological responses to treatment, with similar overall survival rates.

Conclusions:

• Gastrointestinal involvement is an uncommon but potentially severe complication of HCV-related vasculitis, characterized by acute and life-threatening symptoms.
• Unlike in primary vasculitides, GI involvement in HCV-related vasculitis does not appear to confer a worse prognosis regarding overall survival.